Maternal blood groups and differential fertility: a hospital survey from Lahore.
D000017:ABO Blood-Group System; D000293:Adolescent; D000328:Adult; D005260:Female; D005298:Fertility; D006306:Health Surveys; D006801:Humans; D007226:Infant Mortality; D009035:Mothers; D010154:Pakistan; D011247:Pregnancy
D000017:ABO Blood-Group System